Researchers at LIACS have found a vulnerability in open-source code that’s been used around the world for over 15 years. They’ve also developed an AI-based tool to fix the problem automatically. ‘You really can’t afford to lean back.’

As of 1 May 2025, Professor Kartica van der Zon has been appointed professor by special appointment of Family Law, Law of Persons and Juvenile Law at the Faculty of Law of the University of Groningen.

Masses of hamburgers, steaks, cheese and a lot of eggs: Americans love their animal products. But researcher Oliver Taherzadeh discovered that only a relatively small group of high-volume consumers need to modify their diet to achieve an enormous environmental gain.

NATO not only safeguards our security and stability, but also defends Enlightenment principles, promoting prosperity, health and freedom. This is what eminent psychologist and thinker Steven Pinker argued to a packed Great Auditorium.

In a collaborative effort between the Leiden Children’s Rights Observatory, the Leiden Law Academy, UNICEF and the Petitions Section of the Office of the United Nations High Commissioner for Human Rights, a symposium held last week commemorated the tenth anniversary of the Optional Protocol to the Convention…

Dubai is teeming with world leaders these days at the United Nations' annual climate conference. What can we expect? We look ahead with university lecturer and environmental politics specialist Shiming Yang. 'The funding always comes slowly.'

Shyness is perfectly normal, Michiel Westenberg stated in his farewell lecture. But that doesn’t mean that social anxiety shouldn’t be identified and addressed in good time. ‘Serious shyness has strong genetic roots; you don’t just get over it.’

The European Research Council (ERC) has awarded an Advanced Grant to six Leiden researchers. It awards these significant grants to established principal investigators for ground-breaking, high-risk research.

Due to technological and societal developments, we are being flooded with more information than our brains can process. How does this affect our decision-making, both as individuals and as a society? And can we learn to make better choices? This is what Lotte van Dillen will explore with her profess…

Sense Jan van der Molen is vanaf 1 maart de nieuwe wetenschappelijk directeur van het Leiden Instituut voor Onderzoek in de Natuurkunde.

Valedictory lecture

Inaugural lecture

Federica Antoniani is the recipient of the very first MA thesis prize awarded by Leiden University’s Europe Hub. She received the prize for her thesis entitled 'Accounting for Accountability: Europol between Protecting Personal Data and Fostering Innovative Artificial Intelligence for Law Enforcement…

The moment has finally arrived: after months of hard work, the strategic plan is finished. It was an interesting period, thinks core group member Sylvestre Bonnet. 'How we finally arrived at this strategic plan was very different from what I had thought beforehand.'

His Surinamese neighbours in Amsterdam gave Russia expert and economic historian Isaac Scarborough an idea: a re-evaluation of the Surinamese economy in the twentieth century. An NWO XS grant will enable him to make a start on this.

One of our RISE members, Prof. Laura Heitman, has been nominated for the TOPX Females to Follow “Guiding Star” award. TOPX empowers promising and ambitious women, and aims to honour inspirational females with remarkable careers in Life Sciences. TOPX selected her (and 7 other female professionals) because…

PhD defence

Lecture

It is one of the most personal and simultaneously most universal experiences of human life: caring for a young child. Professor Sarah Cramsey has been awarded an ERC Starting Grant to investigate how factors such as nationality, political systems, and religion influence the first thousand days after…

What’s at stake at the NATO summit in The Hague? Three academics from Leiden share their insights.

Last week, Leiden University welcomed the rectors of the League of European Research Universities (LERU) to the autumn edition of the Rector’s Assembly. They discussed research, innovation and education policy within the European Union, the challenges and opportunities surrounding defence research,…

eLaw - Center of Law and Digital technologies from Leiden Law School, and the Vascular Surgery Department at Leiden University Medical Centre in the Netherlands, join forces to explore the use of AI for diabetes and secondary prevention of diabetic foot problems and won a prize for it.

In the student-made documentary, our Field School manager, Dr Arjan Louwen, gives a brief introduction on the importance of the excavation in Oss. Watch the documentary below.

For almost 25 years, ‘de Handboeken Veiligheid’ have been a phenomenon. Who does not have a copy on their bookshelf? In 2024, the series will be celebrating its 25th anniversary and next Monday, the Public Prosecution Handbook will be presented: the latest volume in the series. Erwin Muller talks about…

Within the scope of innovating and connecting – the theme of our new Strategic Plan – I paid a visit to Brussels last week. It is important to give Leiden University a face in Brussels and to show our expertise, on Africa for instance.

PhD defence

According to a recent court ruling, the reception of asylum applicants in the Netherlands is not in line with European requirements. The Dutch Government must take measures to amend the situation. What are the problems concerning the reception of asylum applicants and how realistic are the court’s d…

Emeritus professor Joke Bouwstra (LACDR) will receive this year's Dr Saal van Zwanenberg Ereprijs: a tribute to her years of fundamental research on the skin and the transport of drugs through the skin. This is the first time the prize has gone to a woman.

Professor Ariadne Schmidt and Associate Professor Arie van Steensel (University of Groningen) have produced A Companion to Medieval and Early Modern Leiden, the first English-language history of Leiden. Mayor Peter Heijkoop received the first copy.

For too long the Dutch collective memory has judged the Jewish Council too harshly. This perspective needs to be adjusted, Bart van der Boom argues in his new book ‘De politiek van het kleinste kwaad’ (lit. ‘The Politics of the Lesser Evil’).

Of course, Jan Melissen is proud of the publication of his new book. Even so, one painful memory lingers: because of American interference, he was forced to remove the chapter on citizen diplomacy, diversity and inclusion. ‘It did affect me.’

Hoe kijken Nederlandse bedrijven naar online prijsdiscriminatie? Kimia Heidary, Bart Custers, Helen Pluut en Jean-Pierre van der Rest schreven hier een artikel over.

In 2021, Assistant Professor Tax Law Rens Pieterse published a biography about former professor in tax law H.J. Hofstra. Dutch magazine ‘Het Register’ did an extensive spread on Pieterse, his writing and other activities.

Europe’s security suddenly looks uncertain now President Trump has started negotiations with Putin. What does this mean for the Netherlands? What do we need to do?

At one time, the railway from Kimberley to Kambove in Southern Africa symbolised prosperity and progress. Today, the exhausted mining towns along its route are marked by decay and pollution. Professor Jan-Bart Gewald has been awarded an NWO L grant to investigate the long-term global consequences.

Under #TheCode European media report about Martijn Nouwens’s research on the secretive EU Code of Conduct Group which is tasked with tackling harmful tax competition in Europe. The stories expose to the wider public for the first time how this diplomatic high-level working group of EU Member States…